En-suites in Windsor

Postcode districts: SL4
Nearby: Slough, Egham and Staines
Guide price: £5,000–£10,000
Typical time on site: 4–8 working days
Water: Hard across most of Berkshire
Survey: Free, at your home

What does an en-suite cost in Windsor?

As a guide, budget £5,000 to £10,000 including VAT for an en-suite in Windsor; your written quote will pin it down. We adjust the national guide for South East England, where prices are typically about 12% above the UK average. The figure depends on the size of the room, whether anything moves, and the products you pick.

Refit

£4,500–£7,800

Existing en-suite, same layout

Typical

Upgrade

£6,700–£10,750

Fitted furniture with storage

New en-suite

£7,800–£15,750

Ventilation and electrics to regulations

Guide prices for Windsor including VAT. Your itemised written quote after the free survey is the price that counts.

Working in Windsor

In Windsor we cover SL4; we also cover Slough, 1.8 miles away, and Egham.

Homes in and around Windsor vary, so we look at the floor, the walls and the water system before we price anything. If the en-suite in your Windsor home was squeezed in by a previous owner, a refit is a chance to fix the door swing and the tray size. If you live in a Windsor flat, check the lease before planning a new en-suite, as freeholder consent is often needed for new drainage and vents.

Most of Berkshire has hard water. If your supply in Windsor is the same, limescale on shower glass and heads is a real issue: easy-clean glass, rub-clean nozzles and a squeegee make a big difference. Hardness varies street by street, so check the figure for your postcode with your water supplier.

What the job includes

A door that suits a tight space: inward, outward, sliding or a pocket door
A pumped waste or macerator where gravity drainage is not possible, and only where the house already has a WC on gravity drainage
Tiling, silicone, testing and making good on the bedroom side of any new walls
A survey that traces the route from the en-suite to the soil stack and checks the fall the waste pipes would need

Decisions to make first

Refit or new en-suite

A refit keeps the existing drainage and walls. A new en-suite costs more because the walls, waste route, fan duct and electrics all start from nothing.

Exposed or concealed valve

An exposed bar valve is quicker to fit and easy to service. A concealed valve looks cleaner but sits inside the wall, so plan how it will be reached for repairs.

Rules that apply in England

In England, a new en-suite brings in Part H for the new connection to the soil stack, Approved Document F for ventilation, at 15 litres per second intermittent or 8 litres per second continuous extract, and Part P for the new circuits. The electrician should be registered with a competent person scheme, or the work notified to building control. On a refit, avoid replacing the fan with a less effective one.

More about en-suites

En-suites in Windsor: questions

How much does an en-suite cost in Windsor?

An en-suite in Windsor usually costs £5,000–£10,000 including VAT. Expect the lower end for a like-for-like job with standard products, and the upper end if things move or you choose premium finishes. Your quote is itemised and fixed in writing once agreed.

Is the water hard in Windsor?

Who handles building control for an en-suite in Windsor?

Building control for Windsor is handled by the local council or an approved inspector. If your job needs sign-off — for example a new circuit, new drainage or a new extractor where there was none — we tell you at the survey and handle the notification as part of the work.

How long does an en-suite take?

Allow 4–8 working days on site for most jobs, plus the lead time for products after you approve the quote. We give you a day-by-day plan before work starts in Windsor.

Can you put an en-suite anywhere?

Almost anywhere the waste can reach the soil stack. Gravity drainage needs a steady fall in the pipe, so the further the en-suite is from the stack, the more depth you need under the floor or behind boxing. Where that is not possible, a pumped waste or macerator can be used if the home already has a WC on gravity drainage. Our guide to adding an en-suite covers this in more detail.